Door-controlling apparatus



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F. 0. LIMING.

, DOOR CONTROLLING APPARATUS.

APPLICATION FILED MAR. 27, I919. I 1,352,980, PatentedSept. 14, 1920.

2 SHEETS-SHEET I.

' F. 0. LIMING. DOOR CONTROLLING APPARATUS.

APPLICATION FILED MAR. 2L 1919. 1,352,980. I PatentedSept. 14, 1920.

2 SHEETSSHEET Z.

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FRANZ o. LIIVIING, or CHICAGO, ILLINOIS, assrenon or ONE-HALF To Jenn M.

. LIMING, or rAInrIELn, IOWA.

I DOOR-CONTROLLING APPARATUS.

To all whom. it may concern.

Be it known that l, FRANZ O. LIMING, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful lmprovements in Door-Controlling Apparatus, of which the following is a spec fication.

One of the objects of the invention .is to I provide an organized-mechanism for automatically closing a hinged door, when the latter is operated within a given limit of its movement, and which will retain the door in open position by moving the door beyond.

said limit of movement, and so arranged that still further movement of the door, in the same direction, will disengage the holding means to release the door, whereupon it will automatically operate to close the door. For

ther move it, in the same direction, to a slight extent, whereby to disengage the doorholding'mechanism, whereupon the door will then be automatically closed and will continue to be automatically closed each time it is opened until the door is once more opened beyond said limit of movement.

The organized apparatus disclosed hereln comprises a door-holding mechanism, such as disclosed in my P tent No. 1,291,033 granted January 14, 1919, and an improved combinatively related door-closing mechanism hereinafter specifically pointed out.

Other and further objects of my invention will become readily apparent, to persons skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein Figure 1 is an elevation of the upper part of a hinged door showing the door-controlling mechanism in place.

Fig. 2 is a transverse section taken on line 2-2 of Fig. 1. I I

Fig. 3 is a vertical central section of the door check; and V Fig. 4 is an elevation of the door holding Specification of Letters Eatent. Patented S t 14 1920 Application filed March 27, 1919. Serial No. 285,587.

means as specifically pointed out and claimed in the aforesaid patent.

In all the views thesame reference characters are employed to indicate similar. parts.

in the illustrated embodiment'of theinvention, 5 1s a door hinged, as at 6, to a jamb 7. Secured to the door "at a suitable location, and near its top end, is a door holding catch 8 and fixed to the door, parallel with the catch mechanism, is the catch rod 9 spaced away from the door and secured at one end by abracket 10 and at the other endby a bracket 11. The bolt 12 of thelatch is adapted to have limited movement on the rod 9. ber of the doorjamb, is a bracket 13, in

Secured to the upper frame inemwhich is pivoted an arm 14. The outer free I end ofthe arm is bifurcated, there-being a 7 short member 15 and av relatively longer member 16. The latter member is pivoted to a lug 1'? that freely slides upon the latch rod 9. Pivoted to the bracket 18, which is fixed to the door 5, is a pneumaticdoor-check cylinder 19, provided with a piston 20. A piston rod 21 is secured to the piston and passes through an end 22, of'the cylinder, into a relatively small cylinder 23, that is. pivoted,

as at ill, to the shorter arm 15 of the major @n theoutere'n'd of the piston rod 21, is ahead 25,that.prevents the outer end of the rod 21 from leaving the cylinder 23', the latter being contracted at its outer end by an inturned part of the cylinder wall for that purpose. The smaller cylinder 23 permits some lost motion movement between the piston, andthe arm member 14, when the door is opened and closed, so that the initial movement of the door, in either direction, is not cushioned orresisted bythe pneumatic cylinder and the axially moving piston therein. The rearhead 22 of the cylinder is provided with a vent 26 so that when the piston moves rearwardly, the airpasses I out more or less freely from the cylinder.

and there is very little cushioning effect. The head 27 at the front end of the cylinder is provided with a regula-ble vent effected by the screw 28. The screw is tapered so as to regulate the area or size o'f the vent and this has the effect of retarding the movement of the piston, within the cylinder, to a greater or less extent, during door closing operation.

l/Vhen the door is being opened, the lug 17,

connected to'the arm 16, movesv along the yond the distance, that admits of engagement of lug 17 and bolt 12, to which it may be moved without beingaliected by the catch.

The use and operation of the catch mechanism is shown and fully described in the patent to which reference hasheretofore been made. 7

When the lug 17 has been moved beyond the position shown in Fig. 4;, the bolt 12 operates to raise the latch 30 out of the path of the lug l7, whereupon the door will be freely moved, by the two springs 82 and 83 that are coiled about the axis of the arm 14 to closed position. A spring 34 may be placed around the rod 9' to assist the spring 35 within the latch mechanism. 8.

Fig. 2 shows in full lines and in dotted lines the positions of the door and mechanism, when the door is closed and when it is partly open, respectively.

While I have herein shown a single embodiment of my invention for the purpose of clear disclosure it will be manifest to persons skilled in the art that considerable changes may be made in the general arrangement and configuration of the parts within the scope or" the appended claims.-

Having described my invention, what I claim is l. A. door controlling mechanism having in combinative relation, means to automatioally close the door withln a prescribed 'nected to said piston; a door-catch having a bolt projecting therefrom, mounted on the door; a guide rod for said bolt, mounted on the door parallel with the catch, and a lug, slidable on said rod and pivotally connected to the other member ofsaid arm, whereby to cooperatively connect the door-holding means and the door-closing means for the purpose described.

3. A door controlling means having in vcombinative relation, a cylinder pivoted to the door; a piston therein; a spring-urged arm pivoted to the door jamb andebifurcated' at its free end by a short and a long member, said short member connected to said piston; a lost-motion device in said connection; a rod, substantially parallel with the upper end of the doorand secured thereto; a lug, movable along said rod, by movement of said door, and pivotally connected to, the longer member-of said arm and a door-holding mechanism, operable by movement of said lug, alongv said rod, when the door has been opened to a predetermined degree.

scribed my name.

FRANZ o. LIMING.

In testimony whereof I hereunto; Sub' 

